What is CVE-2017-0221?

CVE-2017-0221 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-05-12.

How severe is CVE-2017-0221?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Microsoft Edge

CVE-2017-0221

A vulnerability exists when Microsoft Edge improperly accesses objects in memory, aka "Microsoft Edge Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-0227 and CVE-2017-0240.

Vulnerability class: Buffer Overflow

Published 2017-05-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.048 (91.7th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.048 · newest: 0.048 · change: 0.000

Affected products

Microsoft Edge
Microsoft Corporation Edge — versions Windows 10 Version 1607 for 32-bit Systems and Windows 10 Version 1607 for x64-based Systems.

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.securityfocus.com/bid/98147 (VDB Entry, Third Party Advisory, vdb-entry)
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0221 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2017-0221?: CVE-2017-0221 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-05-12.
How severe is CVE-2017-0221?: High severity. CVSS v3 base score is 7.5 out of 10.